Minimum shear reinforcement in pile caps?

[abusementpark]

Do ACI's minimum shear reinforcement apply to pile caps? I know it says that the minimum reinforcement requirements don't apply to "footings." Do pile caps fall under this category?

 

[InDepth]

You may want to look in the manual of concrete practice, I thought the minimum didn't apply to footings because there is continual spring supported conditions from the soil. I would use minimum reinforcement requirement unless your more rigorous analysis indicates less and then take on the ACI increase requirement.

For very thick pile caps, I use "shear reinforcement" but thats really the strut and tie requirement as well as an ACI publication.

I would also put flexural steel top and bottom if you have seismic loads.

 

[ron9876]

hokie66 I probably didn't make myself clear. That is what I meant. CRSI increases depth until "normal" shear doesn't govern. They then check for direct shear which is more of a true shear as opposed to diagonal tension.

I don't think that ACI requires strut and tie for loads within d for a pilecap.